Detachable wheel.



l. V. PUGH.

DETACHABLE WHEEL.

APPLICATION FILED AUG. 3o. 1909. RENEwED Nov. ao. 1914.

' Patented July 6, 1915.

iwal l ma/QM Wit() y COLUMBIA PLANOURAPH c0 .wAsnmGToN.u1c.

DETACHABLE WHEEL.

Specication of Letters Patent.

Patented July 6, 1915.

Application led August 30, 1909, Serial No. 515,237. Renewed November30, 1914.-. Serial No. 874,907.

T0 all whom t may concern.' v

Be it known that I, JOHN VERNON Prier-I, a subject of the King of GreatBritain and Ireland, and residing at Guiting I-Iouse, Allesley,Coventry, in the county of Warwick, England, have invented certain newand useful Improvements in Detachable Wheels, of which the following isa specilication.

This invention relates to detachable wheels of the kind in which adetachable hub part, carrying the spokes and felly, is mounted upon apermanent hub part. In such wheels, it is used to hold the outer hubpart upon the inner by means` of a lock-nut or ring, provided with apawl device to prevent loosening of the locknut or ring. The pawllocking devices at present in use, however, are open to the objectionthat if they j am, so that they cannot be pushed out of engagement withtheir notches, the wheel can only be taken to pieces after somewhatviolent handling, which is liable to produce expensive damage to theWheel. Moreover, access cannot be had to the pawl without removing thewheel, and dismantling the withdrawing nut.

The object of the present invention is to provide an improved lockingdevice, by which the above mentioned objections may be avoided, withoutreducing the security of the locking effect.

The invention consists in mounting upon the outside of the locking ringor nut, a pawl with an engaging end passing through a slot in the ringor nut, to engage with teeth formed in one of the hub parts, say theouter, this pawl being entirely inclosed by a cover; and a part of thepawl element being adapted to be acted on by a spanner or a cam or thelike acting thereon to release the paul from engagement with the ratchetteet i. f

According to the invention, the pawl is accessible for inspection orremoval, and it is unnecessary to take off the wheel, or even the lockring, in order to inspect or entirely remove the pawl.

The invention also consists in the improved locking device hereinafterindicated.

Referring now to the accompanying drawings; Figure 1 is an elevation ofn ring Showing my improved pawl locking device inclosed within a cover.Fig. 2 is a section on the line A-A ofFig. l, showing the locking partof the removable outer and permanent inner hub parts. Fig?) is a sectionon the line BkB of Fig. l, Figs. t and 5 show plan and elevationrespectively of the cover inclosing the pawl-locking devices, while Fig.6 is a section on the line C-C, Figs. 4 and 5, Figs. 7 and 8 show a planand elevation respectively of the pawl, while Fig. 9 represents a springfor pressing on the pawl, Fig. l0 represents a spanner for use with themodilication shown in Figs. l to 9.

In carrying the invention into eHect ac cording to the constructionshown in Figs. l, 2 and 3 the outer hubpart, a, is held on the inner hubpart x by means of the locking ring, b, which also carries a withdrawingring, c. Attached to the outer hub part, a, is another ring, d, providedwith ratchet teeeth or other suitable castellations as shown at e.

vAttached to the locking ring, h, by means of two screws, f, is a cover,g, shown in detail in Figs. 1, 5 and 6 and the ends of the cover are`provided with bosses, t, which may be rounded and which entercorresponding recesses in the locking ring, h, or the rounded ends ofthe cover, g, may each engage about one half of an annular groove cut inthe ring.

The pivot for the pawl, n, (shown in Figs. 7 andv 8) may be formed by ascrew, o, which screws into the cover, g, a recess being provided in thelocking ring, o, to accommodate the head of the screw. The screw, o, mayif desiredv screw into the locking ring or the pivot forthe pawl, n, maybe formed by a pin on the locking ring entering a corresponding hole inthe cover. `A projection, m, on the pawl projects through a slot in thelocking'ring, o, to engagewith the ratchet teeth on the ring, d, Xed onthe outer hub part, a. A portion of the iange on the cover, g, is cutaway and the pawl, n, is so shaped that it lies liush withthe edge ofthe cover, g, when in its normal position. The spring, p, shown in Fig.9 is passed over one of the screws, 7, and engages with the pawl, n, asshown in Fig. l. By this means a very secure anchorage is ai'orded forthe pawl although the whole pawl locking device may be very easilyremoved without taking off the wheel from its axle or hub. Moreover ifthe locking device becomes damaged the lock ring and pawl may be veryeasily replaced by an'inexpensve spare. It will be seen that if the pawljams the projecting end of it may be tapped so as to force it intoposition. l

A suitable form of spanner for removing the looking ring is shown inFig. 10, and is applied in the following manner. The end carrying theprojections, 1, is applied first, these projections entering therecesses, 2, on the locking ringt. The cam end is then engaged and thecam, 3, is moved from the positions shown in full lines to thatindicated by the dotted lines. In this latter position the cam, 3,enters the slot on the top of the cover, g, thus depressing the pawl, a,and causing the extension, m, to disengage from the ratchet teeth c,formed on the outer hub member, a. It will be evident that while thepawl, n, is depressed, it is impossible to remove the spanner from thelocking ring, Y), two projections, 4, on the Spanner placed preferablynear the already mentioned projections, l, and engaging with the sidesof the locking ring, b, acting in conjunction with the cam, 3, and thecover g, to prevent this.

In the case of the inclosed pawl the two screws which secure the cover,g, to the ring may be prevented from accidental unscrewing by means of aspring plate fitting over the heads of the screws and riveted orotherwise s secured to the pin which passes through the pawl or thescrews may be secured against unscrewing by lightly riveting over whenthe ring is out of the hub.

Although in the drawings I have shown a locking ring having a conicalsurface engaging with a similar conical surface on the outer hub member,it is to be understood that such an arrangement does not in any way formpart of the subject matter of the present invention and is therefore notclaimed in this specication.

It will be seen that many modifications may be made in the method ofcarrying this invention into eEect without in any way departing from thesjirit of the same.

Having now descri ed my invention what I claim as new and desire tosecure by Letters Patent is: j

l1. A pawl yloclring device vfor detachable wheels comprising incombination an outer and an inner hub part, a screwed member for holdingthe outer hub part inl position on the inner hub part, a cover removablysecured to said member, a locking pawl pivotally mounted on the insideof said cover, a slot in said member, and a projection on `said pawlextending through said slot to engage with castellations on the outerhub part, whereby on removing said cover the pawl is removed from thescrewed member while the latter is acting to hold the outer hub part inposition on the inner hub part.

2. A pawl locking device for detachable wheels' comprising incombination, an outer and an inner hub part, ascrewed member for holdingthe outer hub part in position on the inner hub part, a plate havingianged edges removably fastened with said edges bearing on the face ofsaid member thus providing a space between said member and said plate, apawl pivoted on the inside of said plate and capable of movement in saidspace, a slot in said member, and a projection on said pawl extendingthrough said slot to engage with castellations on the outer hub part,whereby on removing said plate the pawl is removed from the screwed mem`ber while the latter is acting to hold the outer hub part in position onthe inner hub part.

3. A pawl locking device for detachable wheels comprising in combinationan outer and an inner hub part, a screwed member for holding the outerhub part in position on the inner hub part, a plate having ianged edgesfastened by two screws on the face of said member, said edges bearingupon said face and thus providing a space between said member and saidplate, a pawl pivoted on the inside of said plate and capable ofmovement in said space, a slot in said member, a projection on said'pawl extending through said slot to engage with castellations on theouter hub part, and a spring positioned in one end of said space andretained therein by one of said screws and acting upon said pawl toretain it in engagement with said castellations, but allowingdisengagement of said pawl for backward rotation of said nut, whereby onremoving said plate the pawl is removed from the screwd member while thelatter is acting to hold the outer hub part in position on the inner hubpart.

4. In ycombination in a detachable wheel, an outer and an inner hubpart, a screwed member securing the outer hub part upon the inner hubpart, a pawl locking device removably secured to the outside of saidmember, and a tool for rotating said member which carries means forreleasing said locking device, said means retaining said tool upon saidmember so long as said lock ing device is held in the released position.

5. In combination in a detachable wheel, an outer and an inner hub part,a screwed member for holding the outer hub part in position on the innerhub part, a cover removably secured to said member, a locking pawlpivotally mounted on the inside of said cover, a slot in said member, aprojection on said pawl extending through said slot to engage withcastellations on the outer hub part, and a tool for rotating said memberwhich carries means for releasing said locking pawl, said meansretaining said tool upon said member so long as said locking pawl isheld in the released position.

6. In combination in a detachable wheel,

an outer and an inner hub part, a screwed member for holding the outerhub part in position on the iner hub part, a cover removably secured tosaid member, a pawl pivotally mounted on the inside of said cover, aslot in said member, a projection on said pawl extending through saidslot to engage with castellations on the outer hub part, said pawlhaving one edge flush with an edge of said cover when said projection isin engagement with said castellations, a tool for rotating said memberand a cam carried by said tool which is inserted behind said cover todisengage said pawl from said castellations by which means said tool isretained upon said member so long as said pawl is held in the disengagedposition.

7. In combination in a detachable wheel, an outer and an inner hub part,a screwed member for holding the outer hub part in position on the innerhub part, a plate having flanged edges fastened by two screws on theface of said member, said edges bearing upon said face and thusproviding a space between said member and said plate, a pawl pivoted onthe inside of said plate and capable of movement in said space, a slotin said member, a projection on said pawl extending through said slot toengage in castellations on the outer hub part, one edge of said pawlcoinciding with an edge of said plate when said projection is soengaged, a spring positioned in one end of said space, and retainedtherein by one of said screws, and aoting upon said pawl to retain it inengage ment with said castellations but allowing disengagement of saidpawl for backward rotation of said nut, a tool for rotating said member,and a movable cam carried by said tool for disengaging the pawl, thesaid action locking the tool upon said member so long as the pawl isheld out of engagement.

In testimony whereof, I have aHiXed my signature in presence of twowitnesses.

JOHN VERNON PUGH. Witnesses:

ETHEL EVANS, FLORENCE SKINNER.

Copies of this patent may be obtained for ive cents each, by addressingthe Commissioner of Patents. Washington, D. C.

